Outdoor artificial turf

Does the "vermiculite/cement" combo allow drainage? Or, if not, where does the dog pee go?

Fabulous!!!
I have two mats (each 2x4) just sitting on the flagstone courtyard. They are sitting on the slight slope that drains out under the garage door to the street. I wash them down every couple of days as well but pick up poop and bag it every day. Ginny is fastidious and will only go pee and poo on the mats. Cora could care less... but she was born and raised in a dog run with only solid concrete underneath. We got her when she was three months old but it has proved to be impossible to change her habits. No bigee because she has never pooped or peed in the house... not ever and she is now 7. I'm grateful for that. Funny, same thing with the Belgian Malinois we had previously.